exam Maths Puzzle Numerical Ability

Can someone help me here?

I need to solve the system by addition or substitution

3x - 4y = 8
6x - 2y = 10

Thanks,
Jamie

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exam Other Question

simplify: 3 square roots of(2/7) - 5 square roots of(7/2) + 3 square roots of 56. Please help me solve, thanks

Rewrite the equation -8x - 5y = -45 as a function of x.